Sennheiser CX 300B MK II Precision Enhanced Bass Earbuds (Black)

by Sennheiser

Product Features

• Excellent voice clarity and comfortable fit
• Excellent bass response
• Convenient carrying pouch included
• Customizable ear adapter system achieves the perfect fit
• Asymmetrical cable reduces tangles and cable clutter
• Designed to fold flat
• Excellent Bass
• Excellent voice clarity and comforatable fit
• On Ear Design

Product Details

• Product Dimensions: 4.6 x 16 x 9.1 inches ; 2.9 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B001EZYMF4
• Item model number: CX300 MK II
• Average Customer Review: 4.0 out of 5 stars  See all reviews (546 customer reviews)
• Amazon Best Sellers Rank:
  • #33 in Electronics > Accessories & Supplies > Audio & Video Accessories > Headphones
  • #81 in Electronics > Portable Audio & Video > MP3 Players & Accessories > MP3 Player Accessories
• Discontinued by manufacturer: Yes
• Date first available at Amazon.com: October 2, 2001

Product Description

Offering a powerful, bass-driven stereo sound with greater clarity and improved dynamics is the CX 300-II ear-canal phone. The various sizes of ear adapters (S/M/L sizes) provided in the package allow for a personalised fit as well as a high passive attenuation of ambient noise. Also, the asymmetrical cable design ensures a high wearing comfort as you listen on the go.

Most Helpful Customer Reviews

187 of 193 people found the following review helpful

4.0 out of 5 stars Kilpsch Image S4 killers November 17, 2011

By Ted S

Amazon Verified Purchase

I will start with saying that I love headphone/earbuds, and I am on a life-long quest to find great sound. Actualy, sometimes I feel it is more like an addiction (like buying a new set of cans at 2:30 in the morning because I cant sleep). It is not realistic to say that these little buds are the Be all End all of pristine and perfect sound quality that people spend beacoup bucks trying to find. Not everyone is crazy like me and willing to spend $400-$800 on a set of buds or cans that will bring ever so slightly supperior sound quality. So unless you are me and have a need to stick anything that claims to be high quality in or on your ears, and you are just looking for a fantastic sound at an unbelieveable price - GET THESE!!! (But a strong word of caution - buy only from authorized retailers. I suggest chooseing ships and sold from Amazon as they are an authorized retailer and honor the 2 YEAR warranty!)

A little backround on my references of comparison: As far as earbuds are concerned, I own the Monster Turbines Pro (gold), Ultimate Ears Triple Fi 10s, Monster Jamz, Maximo iMetal w/ mic, Etymotic Research MC5, and of course the Klipsch Image S4. I'm not going to bother with much comparison of the Turbine Golds or the Ultimate Ears, suffice it to say they are slightly better sound, better Isolation, better asthetics, better accessories and hundreds of dollars more. Lets also toss out (litteraly) the Maximos, they are terrible but have a good mic. I gave them to my wife who could care less about sound quality but loves the cloth wrap on the cable. This leaves us with the Monster Jamz, the Etymotic MC5, and the darlings of cnet and therfore the internet - the mighty Klipsch S4. In this case we are really just nit picking here because all of thease buds are great for the price (or the street price). I found that if isolation is what you are looking for the Monster Jams and thier solid metal construction provide the best, but the lows are flat and the buds themselves are heavy. I have also heard that they are prone to cord breakage and other issues, but they do have a 3 year warranty. I wouldnt know as I use them sparingly. The Etys are a great set of buds and offer great sound quality for the buck, but have a very odd look to them and also leave the low end of the spectrum a little flat and in the background. As for the Kipsch S4, this is a very good set as well, but I am a little amazed at how highly regarded the are. They are good, dont get me wrong, but are they the best earbud under $100? No, no they are not. They do try very hard to be dynamic and emphisize bass and trebble but this also comes at the cost of the midrange falling into the background a bit. This emphisizes the frills of a song, but leaves the meat of it a little left behind. They also take forever to burn in, for me it took over 70 hours to get the best sound. My biggest issue with the S4 is that because the dynamic driver pushes an emphasis on the highs they can sound tinney, metalic, or unnatural at times - Try Amy Winehouse's Back to Black at a reasonably loud level and you will hear what I am talking about. And I do not mean to pick on the S4, but if all your are going by is the Cnet or Amazon reviews then they will push you toward this set and you may be missing out on hidden gems for less money. The Sennheiser CX300 MX II are incredable for the price here. They have do have a dymanic frequncy responce curve that favors the higs and the lows, but less exagerated and the dip in the mids is not nearly as pronounced as the S4. The Senns still have supprisingly punchy bass and clear highs and all the while are virtually distortion free. It certainly is a matter of oppinion, but the majority of listeners will bennifit from the Senns flatter frequency curve while still enjoying a good-excelent bass responce.

All this being said, the Senns are about half the price as their lowest competitor. I highly recomend starting with this set of buds due to their price tag, and if their sound leaves you wanting more you can always go up fromt there (Beware this can get addictive). But, I believe that over 99% of casual music listeners will LOVE these. And even for someone like myself, thease have become my most frequently used buds because the sound is fantastic, and if something were to happen to them I know I can pick them up again without breaking the bank.

Here is my rankings:

1) Senheiser CX300 MX II ($25-40)
2) Etymotic Research MC5 ($55-85)
3) Klipsch Image S4 ($79)
4) Monster Jams ($40-120)

*Note: This is ranking sound quality and overall value, if you are looking for superior isolation look at the Monster Jams, or the Etymotic.

83 of 88 people found the following review helpful

5.0 out of 5 stars Great quality for little money July 20, 2009

By Bo Řstergaard Jepsen

I've used Sennheiser earphones for many years now, mainly because of the great quality of their products. That's also why I turned to these CX 300 MK-II, when my Apple in-ear phones decided to call it a life after some 5 months of use. These are half the price of the Apple ones, and the sound quality is better by no small margin. They are very comfortable to wear, even after hours of use. They come with a selection of small, medium, and large interchangeable fittings, allowing one to find the ones best fitting your ear size. They also come with a small satchel in which you can carry them. This little bag, however, is nothing to shout about. I never use it, finding it nigh on useless.

Highly recommendable. Very good sound for a small asking price.

168 of 186 people found the following review helpful

3.0 out of 5 stars Not Great for Running -- Perfect for Everything Else June 4, 2011

By Jeff Kimble VINE™ VOICE

The cliff's notes: I gave these 3 stars because they are very much all-or-nothing in my mind. What I mean is that they are great headphones (4-5 stars) unless you are using them to run (1 star). I use them for running -- making them useless -- but they'd be great for others. And now I will elaborate for those that care.

For runners -- terrible. As most active people know, we have a tendency to sweat. After 1/2-3/4 of a mile, the earbuds become wet (I assume) and sound deteriorates to a horrendous level. The audio level will go from crystal clear to crackly and broken in no time. Furthermore, the asymmetrical cord is a horrendous idea. It sounds great up until a point where you're running against even a slight headwind. This forces the cord to constantly blow over your shoulder, often ripping out your earbud. And while on the topic, the "tacky" rubber that the cord is made of tends to get wound up and twisted onto itself which can be downright infuriating at times -- especially a few miles into a nice run.

For everyone else -- when they are working, they sound superb. I think you'd be hard pressed to find a higher quality product for the price. The mids are great, highs are clear, and bass in punchy. These restored my faith in earbud technology; that you could get enough drive out of something so small (I'm a bit of an audiophile). The different sized ear tips are a huge plus and, when you use the correct size, they are extremely comfortable. Also, they can reduce environmental noise by a huge margin.

So there you have it. If you want to run with these -- ever -- skip them. If you are looking for a new set for the train, plane, or walking about town, these are great. Simple as that.